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ibps-rrb-os1 2018 · Question 63 of 74

A person purchase two adjacent plots, one is in rectangular shape and other is in square shape and combined them to make a single new plot. The breadth of the rectangular plot is equal to the side of the square plot and the cost of fencing the new plot is Rs.390 (at the rate of Rs.5/m). Find the side of square if the length of the rectangular plot is 15 metre.

Quantitative Aptitude (misc)

  1. A10 metre
  2. B12 metreCorrect
  3. C8 metre
  4. D9 metre
  5. E6 metre

Answer: B. 12 metre

Explanation

12 metre Breadth of rectangular plot = b metre = side of square plot Perimeter of new plot metre 78 5 390 = = metre 12 2 24 b 24 15 39 2b 39 2 78 2b + 15 78 = b) + b + (15 2 = = ⇒ = − = ⇒ = = ⇒ ∴

Source: IBPS RRB Officer Scale-I Exam 2018 (memory-based, BankAchievers) · memory-based

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